package com.lzh.exer1;

public class Circle {
	private double radius;//半径

	public Circle() {
		radius = 1.0;
	}

	public double getRadius() {
		return radius;
	}

	public void setRadius(double radius) {
		this.radius = radius;
	}
	
	//返回圆的面积
	public double findArea() {
		return Math.PI* radius * radius;
	}
	
}
